• Title, Summary, Keyword: Separated three-phase flux-lock type SFCL

Search Result 5, Processing Time 0.041 seconds

Fault Current Limiting Characteristics of Separated and Integrated Three-Phase Flux-Lock Type SFCLs

  • Lim, Sung-Hun
    • Journal of Electrical Engineering and Technology
    • /
    • v.2 no.3
    • /
    • pp.289-293
    • /
    • 2007
  • The fault current limiting characteristics of the separated and the integrated three-phase flux-lock type superconducting fault current limiters (SFCLs) were analyzed. The three-phase flux-lock type SFCL consisted of three flux-lock reactors and three $high-T_c$ superconducting (HTSC) elements. In the integrated three-phase flux-lock type SFCL, three flux-lock reactors are connected on the same iron core. On the other hand, three flux-lock reactors of the separated three-phase flux-lock type SFCL are connected on three separated iron cores. The integrated three-phase flux-lock type SFCL showed the different fault current limiting characteristics from the separated three-phase flux-lock type SFCL that the fault phase could affect the sound phase, which resulted in quench of the HTSC element in the sound phase. Through the computer simulation applying numerical analysis for its three-phase equivalent circuit, the fault current limiting characteristics of the separated and the integrated three-phase flux-lock type SFCLs according to the ground fault types were compared.

Comparison of Fault Current Limiting Characteristics between the separated Three-phase Flux-lock Type SFCL and the Integrated Three-phase Flux-lock Type SFCL (분리된 삼상 자속구속형 전류제한기와 일체화된 삼상 자속구속형 전류제한기의 전류제한 특성 비교)

  • Doo, Seung-Gyu;Du, Ho-Ik;Kim, Min-Ju;Park, Chung-Ryul;Kim, Yong-Jin;Lee, Dong-Hyeok;Han, Byoung-Sung
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
    • /
    • v.22 no.8
    • /
    • pp.689-693
    • /
    • 2009
  • We investigate the comparison of fault current characteristics between the separates three-phase flux-lock type superconducting fault current limiter(SFCL) and integrated three-phase flux-lock type superconducting fault current limiter(SFCL). The single-phase flux-lock type SFCL consists of two coils. The primary coil is wound in parallel to the secondary coil on an iron core and superconducting elements are connected to secondary coil in series. Superconducting elements are used by the YBCO coated conductor. The separated three-phase flux-lock type SFCL consists of single-phase flux-phase type SFCL in each phase. But the integrated three-phase flux-lock type SFCL consists of three-phase flux-reactors wound on an iron core. Flux-reactor consists of the same turn's ratio between coil 1 and coil 2 for each single phase. To compare the current limiting characteristics of the separated three-phase flux-lock type SFCL and integrated three-phase flux-lock type SFCL, the short circuit experiments are carried out fault condition such as the single line-to-ground fault. The experimental result shows that fault current limiting characteristic of the separated three-phase flux-lock type SFCL was better than integrated three-phase flux-lock type SFCL. And the integrated three-phase flux-lock type SFCL has an effect on sound phase.

Analysis of Operational Characteristics of Separated Three-Phase Flux-Lock SFCL (삼상 분리형 자속구속형 전류제한기의 동작 특성 분석)

  • Doo, Seung-Gyu;Du, Ho-Ik;Park, Chung-Ryul;Kim, Min-Ju;Kim, Yong-Jin;Han, Byoung-Sung
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
    • /
    • /
    • pp.289-289
    • /
    • 2008
  • We investigated the operational characteristics of the separated three-phase flux-lock type superconducting fault current limiter (SFCL). The single-phase lock type SFCL consist of two coils, which are wound in parallel through an iron core. The high-$T_c$ superconducting(HSTC) thin film connected in series with secondary coil. The separated three-phase flux-lock type SFCL consist of three single-phase flux-lock type SFCL. In a normal condition, the SFCL is not operate. When a fault occurs, the current of a HSTC thin film exceeds its critical current by fault current, the resistance of the HSTC thin film generated. Therefore fault current was limited by SFCL. The separated three-phase flux-lock type SFCL are operated in fault condition such as the the single line-to-ground fault, the double line-to-ground fault and the triple line-to-ground fault. The experimental results, the SFCL operational characteristics was dependent on fault condition.

  • PDF

Current Limiting Characteristics According to the Increase of Voltage in Separated Three-Phase Flux-Lock Type Superconducting Fault Current Limiter Using YBCO CC (YBCO CC를 이용한 분리된 삼상 자속구속형 고온초전도 전류제한기의 전압 증가에 따른 전류제한 특성)

  • Doo, Seung-Gyu;Du, Ho-Ik;Kim, Min-Ju;Kim, Yong-Jin;Lee, Dong-Hyeok;Han, Byoung-Sung
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
    • /
    • /
    • pp.355-356
    • /
    • 2009
  • In this paper, we investigated the fault current limiting characteristics according to the increase of voltage in the separates three-phase flux-lock type high-Tc superconducting fault current limiter using YBCO CC. The separated three-phase flux-lock type SFCL consists of single-phase flux-phase type SFCL in each phase. Superconductor was using the YBCO CC. To analyze the current limiting characteristics of a three-phase flux-lock type SFCL, the short circuit experiments were carded out fault such as the triple line-to-ground fault. The experimental result shows that fault current limiting characteristics was improved on the high voltage level.

  • PDF

Analysis of Fault Current Limiting Characteristics According to Variation of Inductances in Separated Three-phase Flux-lock Type SFCL (분리된 삼상자속구속형 전류제한기의 인덕턴스 변화에 따른 전류제한 특성 분석)

  • Doo, Seung-Gyu;Du, Ho-Ik;Kim, Min-Ju;Park, Chung-Ryul;Kim, Yong-Jin;Lee, Dong-Hyeok;Han, Byoung-Sung
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
    • /
    • v.22 no.6
    • /
    • pp.522-525
    • /
    • 2009
  • We investigated the fault current characteristics of the separates three-phase flux-lock type superconducting fault current limiter(SFCL) according to the variation of inductances. The single-phase flux-lock type SFCL consists of two coils. The primary coil is wound in parallel to the secondary coil on an iron core. And superconductor is series connected on secondary coil. Superconductor is using the YBCO coated conductor. The separated three-phase flux-lock type SFCL consists of single-phase flux-phase type SFCL in each phase. To analyze the current limiting characteristics of a three-phase flux-lock type SFCL, the short circuit experiments were carried out fault such as the triple line-to-ground fault. The experimental result shows that fault current limiting characteristics of additive polarity winding was better than subtractive polarity winding and when the inductances of coil 2 was lower, resistances of YBCO CC was more generated.